Brake or stop device for sound-reproducing machines



R. T. BELL AND L. MANDEL. BRAKE OR STOP DEVICE FOR SOUND REPRODUCING MACHINES.

APPLICATION FILED JUNE 6,1919, 7 1,336,606. Patented Apr. 13, 1920.

2 SHEETS-SHEET I.

R. T.BELL AND L. MANDEL. BRAKE 0R STOP DEVICE FOR SOUND REPRODUCING MACHINES.

APPLICATION FILED JUNE 6.1919.

ELTNETED snares Parana OFFICE.

RAYMOND T. BELL AND LOUIS MANDEL CORPORATION. A

BRAKE OR STOP DEVICE FOR SO Application filed June 6, 1919.

To all ("710/11 it may concern:

a it known that we. Harmon's T. BELL anu Moi. s Man: citizens of the United States, residing at Chicago, in the county oi toolr and State of Illinois have invented certain new and useful Improvements in or Stop Devices for Sound-Reproducing lilachines, of which the following is a specification.

This invention relates to improvements in brake or stop device for sound reproducing machines, and one of the objects of the same is to providean improved brake or stop device oi? this character ei'nbodying hand mechanism which is not only adapted to render the brake or stop device active but which hand mechanism is also adapted to release or set the brake or stop in an ineffective position to be again tripped or rendered active by the said hand mechanism at will or automatically as desired.

A further object is to provide improved means adapted to he set to cause the bralce or stop device to operate automatically at a predetermined point in the travel of the stylus with respect to the record, and which means also operate to compensate any wear or lost motion between the parts.

it further object is to provide an improved device of this character which will be oi a simple and compact construction and effective and efiicient in operation.

To the attainment of these ends and the accomplishment oi other new and use't'ul objects as will appear, the invention consists in the features of novelty in substantia ly the construction, combination nd rangenient of the oral parts hereinat .1 more fuily described and claimed and shown .in the accompanying drawing illustrating this invention and in which:

Figure 1 is a top plan view showing the parts in one position.

Fig. 2 is a view similar to 1 showing; the parts in another position.

Fig. is a side elevation.

Fig. 1 is a detail top plan view of the stop proper.

Fig. 5 is a detail top plan view of the hand device.

Fig. 6 is a top plan view partly in section and with parts omitted. showing; the adjustable actuating finger.

Fig. 7 is a detail side elevation showing the parts in a playing position.

Specification of Letters Patent.

IXQALJDEL, OF CEISAGO, ILLINGIS, ASSIGNORS TO THE OGEPOR-ATION OF DELANABE.

U ND-REPRODUCING MACHINES.

Patented Apr. 13, 1920.

Serial No. 302,318.

Big. 8 is a view similar to Fig. '7 showing the parts in a setting position.

Fig. 9 is a vertical sectional view on the line 99, Fig. 7.

Referring more particularly to the drawing the numeral 10 designates a supporting base of any desired size and configuration and constructed of any suitable material. This base 10 is secured by suitable fasten ing devices to the table support of a sound reproducing" machine beneath the revolving table. Pivotally connected at one end ot the support 10 in any Sllltilhifi manner preferably so as to move about an upright 11 is a stop device proper 12 embodying a body portion having an opening 13 therein to receive the upright 11. Connected with the stop is a projection 1-1- carried by an. arm 15 and this projection 1-1 may be of any suitable construction but preferably consists of a fibrous element adapted to engage the periphery of the table 16. The stop 12 is also provided with an arm 17 and an upwardly projecting lug 18 arranged preferably intermediate the arms 15 and 17. Arranged between the stop 12 and the support 10 is a hand. device 19 of any suitable size and construction and is provided with an opening 20 through which the upright 11 passes. :1 projection 21 is connected with the handle and the projection is oi such a size and shape as to be disposed on one side of the arm 17 to engage the same and move the stop 12 about its pivot when the handle is moved .in one direction. Pivotally connected with'the support 11 as at 22. is a trigger preferably in the form of a bell crank lever, one arm 24 of which terminates adjacent the stop device and is preferably deflected as at 24- to extend in a direction about the upright 11. the extremit of the arm 24 being shaped to form a shoulder adapted to be moved into and out of the path of movement of the lug .18 carried by the stop 12. An elastic member 26 is inter posed between the arm 2-1- and the arm 17, one end of the elastic element being secured to each of the arms. The elastic element is so disposed that it tends normally to move the stop 12 in a direction to cause the portion 14 to engage the periphery of the table 16 and thereby arrest its motion and the elastic member also tends normally to move the arm 24 in a direction to cause the shoulder to move into the path of movement tion as shown in Fig. 2.

of the projection 18 when the latter is in a predetermined position. The arm 24 is so disposed with respect to the arm 17 that the projection 21 on the handle 19 will stand therebetween so that when the handle 19 is moved in the opposite direction the projection 21 will engage the arm 24 to move the shoulder 25 out of the path of movement of the projection 18 and thereby trip or release the stop.

The other arm 27 of the trigger is preferably provided with an offset portion 28 at its extremity and this extremity of the arm is disposed within the path of movement of an adjustable depending finger 29 carried by the tone arm, so that when it is desired to cause the stop device or brake to operate automatically, the finger 29 is set to engage the end 28 of the arm 27 to actuate the trigger. It will be noted that the finger 29 and the projection 21 on the stop 12 both operate upon the arm 24 to trip the arm in the same direction.

It is thought that the operation will be clearly understood from the foregoing, but briefly stated it is as follows: Assuming that the portion 14 of the stop 12 is in engagement with the periphery of the rotatable table 16, the latter will be arrested in its movement and the parts willv be in the posi- When it is desired to release the rotatable support the handle 25 is moved in the direction of the arrow, Fig. 2, and this will cause the projection 21 thereon to engage the arm 17 to move the stop 12 about its pivot and the portion 14 out of contact with the periphery of the table. During this movement the projection 18 will be moved beyond the end 25 of the arm 24 of the trigger at which time the elastic member 26 having been placed under tension by the movement of the stop 18, so that when the handle 19 is released, the elastic member will. tend to move the stop 12 in the opposite direction, causing the projection 18 to abut the shoulder 25 of the arm 24. This will lock the stop in an ineffective position so that the table 16 may revolve freely. Any suitable stop 30 may be provided for limiting this movement of the arm 24. hen it is desired to arrest the movement of the support 16 this may be accomplished automatically or by the hand lever 19. If by the latter, the handle 19 is moved in the opposite direction or toward the right until the projection 21 engages the arm 24, of the trigger to move the latter against the stress of the elastic member 26 until the shoulder 25 disengages the stop 18, at which time the elastic member 26 will then exert its stress upon the stop to move it about its pivot until the portion 14 engages the periphery of the support. Any suitable stop device such as a shoulder 31 may be provided on the arm 24 to limit its movement in this direction and this shoulder 31 may be positioned to contact with the upright 11.

If it is desired to operate the stop device automatically, after it has been set into an inefl'ective position, the finger 29 on the tone arm may be positioned, according to the diameter of the record used, to engage the extremity 28 of the arm 27 and this will trip the trigger by rocking it about its pivot 22 and thereby release the stop 12.

In order to provide a means for compensating the wear and lost motion between the parts of the brake or stop device and at the same time cause the brake to be automatically actuated at a predetermined point in the travel of the stylus and with respect to the record, the active face 30 of the finger 29 is inclined backwardly and upwardly from the lower extremity 31 of the finger toward the opposite side 32 thereof so that the lower extremity 31 of the finger will be wider than the upper portion. This finger is mounted upon the tone arm 33 for pivotal adjustment with respect thereto in any desired or suitable manner, such for instance as by means of a bracket 34 connected with the arm, and a pivot 35 which latter permits the finger to be freely adjusted but the friction between the bracket 34 and the adjacent portion of the finger is such that the finger will remain in its adjusted position under normal pressure upon the finger but under an abnormal pressure the finger will yield and move abaut its pivot.

To set the finger for operation when the record is in position upon the table 16, the brake or stop device is set in an active position, that is with the portion 14 in engagement with the periphery of the table. The tone arm is moved to the right (Fig. 6) until the finger 29 engages a fixed stop 36, which latter will move the finger 29 about its pivot 35 or toward the left in Fig. 6.

It has been found that the constant engaging and tripping oi"- the stop 18 and the end 25 or the arm 24 causes them to wear and the parts will become loose so that when the finger 29 engages the end 28 of the arm 27 to set the stop the arm will yield sufiiciently to prevent the stop from operating properly. To prevent this lost motion and to provide a means whereby the arms will be held rigid when the device is being set and when the finger 29 is moved into contact with the end 28 of the arm 27, the shoulder 31 is provided so that when the parts are in the position shown in Fig. 2 and the shoulder 31 of the arm 24 is given engagement with the upright or stop 11, the projection 18 will pass over the adjacent portion of the arm 24 to cooperate with the stop 11 and thereby lock the end of the arm 24 containing the shoulder 31 against movement about its pivot so that the arm 24 and the arm 2 Will become rigid. After the stop device is set the stylus is then moved so as to position it over that portion of the groove in the record adjacent the final end of the record, or at approximately the point at which it is desired to stop the machine. This is accomplished by raising the tone arm by the sound boa in the same manner as when starting a record, until the stylus is positioned over the desired portion of the final end of the groove. As the tone arm is raised the finger 29 will be also ra' d with the re 'ult that the edge 30 ct th inger vvill enthe end 28 of the arm 27 ot the trigger m at about he point marked i in Fig. 8, and at the same time and the arm 27 is held rigid. the pressure of the finger 2.) against the arm 27 Will cause the. finger to he moved about its pivot 35 to be n'iaintaincd in such position by the friction be parts. Tie st vlus then pc i commencement of the record. It will be noted that when the stylus l wered and the tone arm is correspondingly moved. th point of contact A on the edge 30 of the finger 25) will be lowered and moved out of the plane at the end 28 of the arm 27. so that when during the playing of the record the edge 30 of the finger strikes the end "31 of the. arm 27. it vill do so at a point above the point i or approximately at the point B and as the edge 30 is inclined backnuirdl from the end 31 ot the finger. it will be manifest that the finger will trip the arm at-a point later in the travel of the stylus with respect to the record {FOIL the point at which it was set. This COllStl'll-Ltifill will take up all lost motion and compensate for the wear between the parts. thereb insur ing accurac in operation and the automatic and positive stopping of the record at anv predetermined point in the travel ot' the stvlus with respect to the record. At the same time the proper positioning of tie linger may he obtained inasmuch as the finger operates between the end 28 at the arm 2? and a fixed stop each of which will cause the finger to be moved about its pivot (,5 under an abnormal strain exerted upon the finger by manuall shitting the tone arm for that purpose. 7

Obriouslv manv changes may be made in. the details ot C( lEStPILiJlOD and in the ar rangemcnt of the parts Without departing from the spirit of this invention.

What is claimed as new is:

1. In combination with a rotatable part of a phonograph or the like. a pivotallv \veen the tioned at the u ounted brake therefor. a shoulder (-01% i. cted with the brake, a trigger aid trig'n. iaving a shoulder. means tend' normallv o render the brake effective the said shouh ler on the brake being adapted to engage the shoulder on the trigger to maintain the bralrc ineffective. and a controlling element separate from the brake and the said trigger and movable about the brake pivot, and adapted to operate both the brake and the trigger in one direction and separately from each other.

2. In combination with a rotatable part at a phonograph or the like, a pivotallv mounted brake there tor, a shoulda' connected with the brake, a trigg r, said trigger v 1g a shoulder: means tending normall to render the brake eii'ective. the said shoulder on the brake being adapted to engage the shoulder on the trigger to maintain the brake inefiective. the said means also tending normally to move the shoulder on the trigger into the path of iovement of the shoulder on the brake, and a controlling element sepa ate from the brake and the said rigger and inovablt about the brake pivot t and adapted to operate both the brake. and

trigger in one direction and separately from each other.

3. in combination vvith a rotatable part oi a phonograph or the like. a pivotally mounted bra e therefor, a shoulder connected with the brake a trigger. said trigger having a shoulder. means tending normall to render the brake e'liective. the. said shoulder on the brake being adapted to engage the shoulder on the trigger to maintain the brake ineffective. a controlling element sep arate tr in the brake and the said and movable about the brake pivot and adapted to operate both the brake and the trigger in one direction and separatcl "r'rom each other. and mean; operating autonnitially to trip the trigg to render the said brake ctlective.

4. In combination vvith a rotatable part ot a phonograph or the like. a pivotallv mounted brake therefor a shoulder connected with the brake. a trigger. said trigger having a shoulder, means tending normally to render the brake effective. the said shoulder on the brake being adapted to engage the shoulder on the trigger to maintain the brake ineffective. a controlling element separate from, the brake and the said trigger and adapted to operate both of them in one ,direction and separately from each other. and a d stop for limiting the movement of the trigger in one direction. the said controlling element embodying a portion adapted to engage over the trigger to trip the same and hold the trigger locked between the said portion and the said fixed stop.

5. In combination vith a rotatable part of a phonograph or the like, a pivotally mounted brake therefor, a shoulder connected vith the brake. a trigger, said trigger having a shoulder, means tending normally to render the brake effective, the said shoulder on the brake being adapted to en age the shoulder on the trigger to maintain the brake inefiective a controlling element separate from the Cir brake and the said trigger and adapted to operate both of them in one direction and separately from each other, and a fixed stop for limiting the movement of the trigger in one direction, the said controlling element embodying a portion adapted to engage over the trigger to trip the same and hold the trigger locked between the said portion and the said fixed stop, the said means also operating to normally move the said trigger away from the fixed stop and to position the shoulder on the trigger in the path of movement of the shoulder on the brake.

6. In combination with a rotatable part of a phonograph or the like, a pivotally mount ed brake therefor, a shoulder connected with the brake, a pivotally mounted trigger having a shoulder adapted to be positioned into the path of movement of the shoulder that is connected with the brake to be engaged thereby to maintain the brake ineffective, means tending normally to move the brake and the trigger into effective positions, a controlling element, and a projecting ear connected with the controlling element, said controlling element being separate from the brake and trigger and movable iniilepenit ently with respect thereto wherebywhen the controlling element is moved in one direction the said ear will engage a portion of the brake and shift the latter to an ineffective position, and when the controlling element is moved in the opposite direction the said car will engage and move the trigger to an ineffective position.

7. In combination with a rotatable part of a phonograph or the like, a pivotally mounted brake therefor, a shoulder connected th the brake, a pivotally mounted trigger having a shoulder adapted to be positioned into the path of movement of the shoulder that is connected with the brake to be engage il thereby to maintain the brake ineffective, means tending normally to move the brake and the trigger into effective positions, a controlling element, a projecting ear connected with the controlling element, said controlling element being separate from the brake and trigger and movable independently with respect thereto whereby when the controlling element is moved in one direction the said ear will engage a portion of the brake and shift the latter to an ineifective position, and when the controlling element is moved in the opposite direction the said car will engage and move the trigger to an ineffective position, and additional means whereby the said trigger may be automatically tripped to permit the said brake to hecome effective.

8. In combination with a rotatable part of a phonograph or the like, a brake or stop device therefor, the latter embodying a tripping element for the stop, and a traveling finger having an inclined active edge, said tripping element projecting into the path of movement of the active edge of the finger to be set by the finger when the tone arm is raised and whereby when the tone arm is lowered said tripping element will be actuated by said edge at a point later in the travel of the stylus with respect to the record from the point at which it was set, due to vertical pivoting of the tone arm at its base.

9. In combination with a rotatable part of a phonograph or the like, a brake or stop device therefor, the latter embodying a trip ping element, a finger connected with the tone arm for movement therewith and also with respect thereto, the latter movement being due to vertical pii 'eting of the tone arm at its base, means whereby the finger will be maintained in its adjusted position with respect to the tone arm under normal conditions, said tripping element projecting into the path of movement of the finger, the points of contact of the active edge of the finger with the tripping device when the tone arm is in a playing position and when the tone arm is not in a playing position be ing in different vertical planes whereby the tripping device will be actuated at a point later in the travel of the stylus with respect to the record from the point at which the stylus was set. 4

10. In combination. with a rotatable part of a phonograph or the like, a brake or stop device therefor, the latter embodying a tripping element, and a finger connected with the tone arm for movement therewith and with respect thereto, whereby the finger may be adjusted with respect to the tone arm due to vertical pivoting of the tone arm at its base, the said tripping element extending into the path of movement of the said finger with the tone arm, the active er ge of the said finger being inclined to the vertical, the said tripping element being adapted to be set by the finger when the tone arm is raised and tripped by the finger when the tone arm is in playing position, the tripping occurring at a later point in the travel of the stylus from the point at which it was set.

11. In combination with a rotatable part of a phonograph or the like, a brake or stop device therefor, the latter embodying a tripping element, and a finger connected with the tone arm for movement therewith and with respect thereto, whereby the finger may be adjusted with respect to the tone arm due to vertical pivoting of the tone arm at its base, the said t ipping element extending into the path of movement of the said finger with the tone arm, the active edge of the said finger being inclined to the vertical, said edge operating to set the tripping element when the tone arm is raised and also operating when the tone arm is lowered to trip the said element at a point later in the travel of the stylus with respect to the record from the point at which it was set. the said finger being frictionally maintained in its adjusted position with respect to the tone arm.

12, In combination with a rotatable part of a phonograph or the like, a brake or stop device therefor, the latter embodying a tripping element, a finger connected with the tone arm for movement therewith and with respect thereto, whereby the finger may be adjusted with respect to the tone arm due to vertical pivoting of the tone arm at its base, the said tripping element extending into the path of movement of the said finger with the tone arm, the active edge of the said finger being inclined to the Vertical, said edge operating to set the tripping element when the tone arm is raised and also operating when the tone arm is lowered to actuate the tripping element at a point later in the travel of the stylus with respect to the record from the point at which it was set, and a stop device adapted to be engaged by the opposite edge of the finger for shifting the finger with respect to the tone arm. when the tone arm is shifted to position the stylus.

13. In combination with a rotatable part of a phonograph or the like, a brake or stop device therefor, means for tripping the brake the said means being controlled by the vertical pivotin of the tone arm at its base, the said means operating when the tone arm is raised, to set the brake in a position to be tripped and also operating when the tone arm is lowered to trip the brake at a point later in the travel of the stylus with respect to the record from the point at which it was set.

In testimony whereof we have signed our names to this specification, on this 3rd day of June, A. D. 1919.

RAYMOND T. BELL. LOUIS MANDEL. 

